ESP8266通过MQTT连接Domoticz的代码，可以外网控制

#include <ESP8266WiFi.h> #include <PubSubClient.h> //int inputValue = 0; //WiFiClient client; const char* ssid = "你家WIFI"; const char* password = "你家WIFI密码"; const char* mqtt_server = "自己的MQTT服务器"; WiFiClient espClient; PubSubClient client(espClient); void setup_wifi() { delay(10); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); } void callback(char* topic, uint8_t* payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); Serial.println(); for (int i = 0; i < length; i++) { Serial.print((char)payload[i]); } Serial.println(); Serial.print("设备编号:"); Serial.print((char)payload[126]); Serial.println(); Serial.print("控制指令:"); Serial.print((char)payload[173]); Serial.println(); if((char)payload[126] == '1')//设备编号 { if((char)payload[173] == '1')//控制指令 { digitalWrite(0, LOW); Serial.print("灯开了"); Serial.println(); Serial.print("当前控制设备:卧室灯"); } else { digitalWrite(0, HIGH); Serial.print("灯关了"); Serial.println(); Serial.print("当前控制设备:卧室灯"); } } } void reconnect() { while (!client.connected()) { Serial.print(" MQTT服务器连接中..."); //主题对应的设备名称，必须改，不然设备冲突 if (client.connect("卧室灯")) { Serial.println("已连接"); client.publish("domoticz/out", "Reconnected"); client.subscribe("domoticz/out"); } else { Serial.print("MQTT连接失败"); Serial.print(client.state()); Serial.println(" 5秒后重试..."); delay(5000); } } } void setup() { pinMode(0, OUTPUT); pinMode(2, OUTPUT); Serial.begin(9600); setup_wifi(); client.setServer(mqtt_server, 5970); client.setCallback(callback); } void loop() { if (!client.connected()) { reconnect(); } client.loop(); }